Bouncer

Bouncer

Gemini stands at the door. Independent quality gate that audits Claude Code's output before it can stop. Score below threshold? Claude keeps working.

[](https://github.com/buildingopen/bouncer/actions/workflows/test.yml) [](https://buildingopen.github.io/bouncer/) [](https://github.com/buildingopen/bouncer/releases) [](https://github.com/buildingopen/bouncer/blob/master/LICENSE)

Why it gets shared

• Claude cannot wave through unverified work. Another model checks the evidence.
• One install gives you both the automatic Stop hook and the on-demand /bouncer skill.
• The repo is explicit about security, data flow, and how to test the installer in a clean environment.

Live site

https://buildingopen.github.io/bouncer/

User prompt → Claude Code → [Stop Hook] → Gemini 2.5 Flash
                                              ↓
                                         Score 1-10
                                              ↓
                                    ┌─────────┴─────────┐
                                    │                    │
                               Score = 10           Score < 10
                                    │                    │
                              ✓ Approve              ✗ Block
                           (Claude stops)      (Claude keeps working
                                                with Gemini's feedback)

What it looks like

Quick audit:

========================================
  BOUNCER AUDIT: 9/10
========================================

SCORE: 9/10
ISSUES:
- missing explicit test command output in final message
VERDICT: FAIL

Deep audit:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    BOUNCER DEEP AUDIT  [###########################...]  9/10
    GUEST LIST: almost flawless
    Verified in 12.4s
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

How it works

1. Claude Code triggers the Stop hook when it's about to return a response

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